Making a Standard Solution

Question 1

How to make a Standard Solution from a solid?

Answer 1

1. Pour required mass of solid into beaker and add 1/4 total volume of H2O.
2. Pour into volumetric flask, and thoroughly rinse out beaker with water and pour in as well.
3. Add water until bottom of meniscus lines up with calibration mark.

Question 2

How to make a Standard Solution by dilution of a stock solution?

Answer 2

1. Calculate volume of concentrated reagent required
2. Add 1/2 of final volume of pure H2O to volumetric flask
3. Measure required volume of stock sol. using pipette
4. Transfer stock sol. slowly to flask while mixing
5. Add pure H20. Use medicine dropper and meniscus finder to set bottom of men. on calibration line.
6. Stopper flask and mix by inverting several times.